/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.querydsl.mongodb;

import com.querydsl.core.types.ConstantImpl;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.dsl.BooleanExpression;
import com.querydsl.core.types.dsl.Expressions;
import com.querydsl.core.types.dsl.ListPath;
import com.querydsl.core.types.dsl.SimpleExpression;
import java.util.Collection;

/**
 * Mongodb specific operations
 *
 * @author tiwe
 * @author sangyong choi
 */
public final class MongodbExpressions {

  private MongodbExpressions() {}

  /**
   * Finds the closest points relative to the given location and orders the results with decreasing
   * proximity
   *
   * @param expr location
   * @param latVal latitude
   * @param longVal longitude
   * @return predicate
   */
  public static BooleanExpression near(Expression<Double[]> expr, double latVal, double longVal) {
    return Expressions.booleanOperation(
        MongodbOps.NEAR, expr, ConstantImpl.create(new Double[] {latVal, longVal}));
  }

  /**
   * Finds the closest points relative to the given location on a sphere and orders the results with
   * decreasing proximity
   *
   * @param expr location
   * @param latVal latitude
   * @param longVal longitude
   * @return predicate
   */
  public static BooleanExpression nearSphere(
      Expression<Double[]> expr, double latVal, double longVal) {
    return Expressions.booleanOperation(
        MongodbOps.NEAR_SPHERE, expr, ConstantImpl.create(new Double[] {latVal, longVal}));
  }

  /**
   * Finds points within bounds of the rectangle
   *
   * @param blLatVal bottom left latitude
   * @param blLongVal bottom left longitude
   * @param urLatVal upper right latitude
   * @param urLongVal upper right longitude
   * @return predicate
   */
  public static BooleanExpression withinBox(
      Expression<Double[]> expr,
      double blLongVal,
      double blLatVal,
      double urLongVal,
      double urLatVal) {
    return Expressions.booleanOperation(
        MongodbOps.GEO_WITHIN_BOX,
        expr,
        ConstantImpl.create(new Double[] {blLongVal, blLatVal}),
        ConstantImpl.create(new Double[] {urLongVal, urLatVal}));
  }

  /**
   * Finds documents whose geospatial data intersects
   *
   * @param expr location
   * @param latVal latitude
   * @param longVal longitude
   * @return predicate
   */
  public static BooleanExpression geoIntersects(
      Expression<Double[]> expr, double latVal, double longVal) {
    return Expressions.booleanOperation(
        MongodbOps.GEO_INTERSECTS, expr, ConstantImpl.create(new Double[] {latVal, longVal}));
  }

  /**
   * Find documents where the value of a field is an array that contains all the specific elements.
   *
   * @param expr expression
   * @param params params
   */
  public static <T, Q extends SimpleExpression<? super T>> BooleanExpression all(
      ListPath<T, Q> expr, Collection<T> params) {
    return Expressions.booleanOperation(MongodbOps.ALL, expr, ConstantImpl.create(params));
  }
}
